A moment of sheer excitement, experienced only when playing/about to play a game of FIFA. This phrase never gets old. May also refer to the process of, during gameplay, booting the ball with all of one's might in hopes of scoring a goal by miraculously deceiving the goalkeeper. This act is usually accompanied by the phrase "BOOM!!!" itself.

"You can't boom if you never press B"

GUY1: "YOU DOWN FOR BOOM TIME???"
GUY2: "IS THAT A FUCKIN JOKE OF A QUESTION WTF MAN OBVIOUSLY YOU FUCKIN DOUCHE"